Laser+Photonics

Digital images in medicine and life sciences require cameras with a particularly high colour fidelity. Colour pipelines can now be parameterised in industrial cameras; this enables precise colour calibration and adjustment, which can also be performed fully automatically by software.
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Whether from a satellite or a drone, multispectral imaging becomes increasingly important. There, every gram counts. Thanks to a specific microoptical concept, a new multispectral camera system weighs just 200 g and can be produced cost-efficiently.
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A new sensor family is available for the application-specific und fast development of new cameras by only requiring two board layouts in total. Camera manufacturer can reduce costs and accelerate time-to-market for new camera designs.
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Previously unobtainable parameters can be determined with non-contact measurement of the laser beam. And the measuring process itself is extremely fast. That saves time and money in both production and troubleshooting.
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Quantum dots made of perovskite semiconductors may become an alternative for chalcogenide based particles. A full photophysical characterisation with a compact spectrofluorometer allows the emission properties to be determined, loss processes identified and for the quality of the quantum dots to be further improved.
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Multi-spot modules allow for a process-specific adjustment of the spot geometry and laser power, as they optimise critical brazing and welding processes. Originally developed for brazing of hot-galvanised sheets, meanwhile the technology is also available for keyhole welding applications.
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IR laser diodes and IR LEDs open up new fields of application in virtual reality and augmented reality. At the same time, this sets special requirements in terms of development and integration of laser drivers.
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Small and medium enterprises have so far failed to implement laser metal deposition due to the time-consuming nature of the overall process chain, which makes the process uneconomical. But now a consortium has developed an automated process chain suitable for complex tasks.
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When designing precision optical components it is important to consider the manufacturing process and this is particularly true with complex parts such as aspheres. Small design changes at an earlier stage can make a huge difference in terms of feasibility, cost and delivery time.
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Area-oriented UV light curing traditionally uses liquid light conductors or glued bundles of optical fibres. Both of these component solutions permit only limited radiation intensity. End-fused fibre bundles, however, allow to use the full potential of UV light sources for the first time.
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The integration of aspherical optics into a Fizeau lens enables a much lighter and more compact design and also allows the measurement of larger specimens with the same input beam diameter of the objective.
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The development of integrated optical components on a polymer platform is the goal of a Berlin alliance. Basic building blocks are added modularly in hybrid form in order to make optimal use of the respective material advantages.
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Polymer microparticles have diverse material properties and shapes. A device combining Raman spectroscopy and holographic microscopy has been developed for a highly-scalable, cost-efficient detection of these microplastics in drinking water.
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The defined delay between two laser pulses required for spectroscopic measurements is often obtained mechanically. Asynchronous optical sampling can also be used for this purpose. Among its major advantages is a significant reduction in data acquisition times.
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Innovative functions such as the 4-line concept for determining the focus position and the automated alignment of the scan contours enable faster set-up times as well as the processing of complex applications with high quality and repeatability.
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A recently developed laser ellipsometer now enables the determination of optical constants like layer thickness, refractive index or absorption, especially for a number of mid-infrared photonics materials that were so far eluding feasible and reliable measurements.
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The colour reproduction technique is an approximation and it is often insufficient to reliably solve a given machine vision problem. Hyperspectral imaging overcomes this limitation by providing a greater number of spectral bands. The required narrow-band spectral filters can now be implemented at the sensor level.
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The solidification conditions during the laser beam welding process can be changed by spatial beam oscillation whereby the melt bath geometry is influenced and the hot cracking susceptibility is reduced.
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